@Nonnull
private GeoRectangle calcBoundingBox(final double c) {
final double lowerLeftLat = center.getLat() - (Geo.metersToDegreesLat(radiusMeters) * c);
final double lowerLeftLon =
center.getLon() - (Geo.metersToDegreesLonAtLat(radiusMeters, center.getLat()) * c);
final double upperRightLat = center.getLat() + (Geo.metersToDegreesLat(radiusMeters) * c);
final double upperRightLon =
center.getLon() + Geo.metersToDegreesLonAtLat(radiusMeters, center.getLat() * c);
return new GeoRectangle(
new GeoPoint(lowerLeftLat, lowerLeftLon), new GeoPoint(upperRightLat, upperRightLon));
}
/**
* Create a circle geo area with 2 points: one is the center, the other a point on the circle.
*
* @param center Center.
* @param point Point in circle.
*/
public GeoCircle(@Nonnull final GeoPoint center, @Nonnull final GeoPoint point) {
super();
assert center != null;
assert point != null;
final double lat = Math.abs(center.getLat() - point.getLat());
final double lon = Math.abs(center.getLon() - point.getLon());
final double w = Geo.degreesLatToMeters(lat);
final double h = Geo.degreesLonToMetersAtLat(lon, (center.getLat() + point.getLat()) / 2.0);
final double radius = Math.sqrt((w * w) + (h * h));
this.center = center;
this.radiusMeters = radius;
}